A few stand out that share some elements. Which I guess is kinda telling on my tastes but w/e. Also I don't speak Japanese, so this is just what I could figure out/gather.
PRVR-001: https://www.javlibrary.com/en/?v=javli7axzi
The POV model is tied to a chair in a cell with a teacher and two of your typical Japanese schoolgirls, The basic premise is that someone's trapped them in there and they have to get him to cum within a time limit or something vague happens, idk what. Obviously a lot of that wouldn't fly on here at the moment, but I think a gameshow or competition-like approach where the male model is basically just playing the prop role covers a lot of the ones that would fly. VRBangers' old World Cup BJ competition video is a good example.
I can't find the second one right now, but it's a video where a guy is in a stereotypical island or hot springs style retreat. There's a woman off-camera talking to a woman on-camera who starts to go at it with the seated POV model. Gradually more and more women enter, each seeming at least somewhat surprised but also interested, and basically a long line forms with each taking a turn.
Then there's this: https://www.sexlikereal.com/scenes/from-america-to-southeast-asia-pink-salon-school-cultural-exchange-day-31007
Typical Japanese school cultural festival deal, but of course instead of some innocent cafe it's basically an international buffet of girls who go around between the POV model and a pair of other "customers". They each take their turn orally, and then when everyone else is out of the room one starts riding in what seems to be a bit of rule-breaking. The rest come back and all join in.
Basically, for me one of the things that the Japanese industry does way more successfully than the western ones that could be most easily duplicated is playing around with the idea of how we view sex in terms of an activity. Going beyond simply casual sex and totally removing even the idea of it being taboo in the first place. It ends up being a really different experience from most other videos.
